[Toybox] [PATCH] Add fflush to lib/password; remove print from stty

[enh]

I think I added that logging because that's what the "real" atty outputs.

On Wed, Sep 16, 2020, 08:02 Chris Sarra via Toybox <toybox at lists.landley.net>
wrote:

> Hey Rob,
>  I removed that xprintf in stty from our copy a long time ago to get rid
> of a log we didn't really need, but that change can be ignored if others
> find it useful.
> Thanks,
> +Chris
>
>
> On Wed, Sep 16, 2020 at 1:27 AM Rob Landley <rob at landley.net> wrote:
>
>>
>>
>> On 9/15/20 11:39 AM, Chris Sarra via Toybox wrote:
>> > toybox logins were displaying the "password:" prompt after
>> > the user entered a password. This patch fixes the issue so the
>> > password prompt shows *before* password is entered.
>> > ---
>> >  lib/password.c      | 1 +
>> >  toys/pending/stty.c | 2 +-
>> >  2 files changed, 2 insertions(+), 1 deletion(-)
>> >
>> > diff --git a/lib/password.c b/lib/password.c
>> > index 432905cc..2f5997ff 100644
>> > --- a/lib/password.c
>> > +++ b/lib/password.c
>> > @@ -63,6 +63,7 @@ int read_password(char *buf, int buflen, char *mesg)
>> >    xset_terminal(0, 1, 0, &oldtermio);
>> >
>> >    xprintf("%s", mesg);
>> > +  fflush(NULL);
>>
>> This is why xprintf() had the x. This is literally why, but actually
>> flushing
>> before checking for error was too slow. (And then Elliott wanted to
>> enable line
>> buffering for everything, which breaks tee...)
>>
>> Sigh, ok I'm replacing it with dprintf() to avoid the borked stdio
>> buffering
>> entirely, which raises the question should the prompt go to stdout or
>> stderr?
>>
>>   $ sudo /bin/bash
>>   [sudo] password for landley:
>>   $ sudo /bin/bash 2>/dev/null
>>   [sudo] password for landley:
>>   $ sudo /bin/bash >/dev/null
>>   [sudo] password for landley:
>>
>> Answer: it goes to /dev/tty. Right, stop, BIG HAMMER time. ("There's
>> never time
>> to do it right, there's always time to do it over" meets "it is better to
>> light
>> a flamethrower than to curse the darkness", as usual for this project.)
>>
>> >    for (i=0; i < buflen-1; i++) {
>> >      if ((ret = read(0, buf+i, 1)) < 0 || (!ret && !i)) {
>> > diff --git a/toys/pending/stty.c b/toys/pending/stty.c
>> > index 8c937696..fe8f5c8d 100644
>> > --- a/toys/pending/stty.c
>> > +++ b/toys/pending/stty.c
>> > @@ -271,7 +271,7 @@ static int set_special_character(struct termios
>> *new, int *i, char *char_name)
>> >        else if (arg[0] == '^' && arg[2] == 0) ch =
>> (toupper(arg[1])-'@');
>> >        else if (!arg[1]) ch = arg[0];
>> >        else error_exit("invalid arg: %s", arg);
>> > -      xprintf("setting %s to %s (%02x)\n", char_name, arg, ch);
>> > +      //xprintf("setting %s to %s (%02x)\n", char_name, arg, ch);
>>
>> What's this one about? (It's pending, which usually means I'm not as
>> familiar
>> with the guts of the command...)
>>
>> Rob
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>>
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